Search for Planets in Hot Jupiter Systems with Multi-Sector TESS Photometry. I. No Companions in Planetary Systems KELT-18, KELT-23, KELT-24, Qatar-8, WASP-62, WASP-100, WASP-119, and WASP-126

• Autorzy: Maciejewski G.

Identyfikatory

DOI

10.32023/0001-5237/70.3.2

• Języki publikacji: EN

Abstrakty

EN

Origins of giant planets on tight orbits, so called hot Jupiters, are a long-lasting question in the planetary formation and evolution theory. The answer seems to be hidden in architectures of those systems that remain only partially understood. Using multi-sector time-series photometry from the Transiting Exoplanet Survey Satellite, we searched for additional planets in the KELT-18, KELT-23, KELT-24, Qatar-8, WASP-62, WASP-100, WASP-119, and WASP-126 planetary systems using both the transit technique and transit timing method. Our homogeneous analysis has eliminated the presence of transiting companions down to the terrestrial-size regime in the KELT-23 and WASP-62 systems, and down to mini-Neptunes or Neptunes in the remaining ones. Transit timing analysis has revealed no sign of either long-term trends or periodic perturbations for all the studied hot Jupiters, including the WASP-126 b for which deviations from a Keplerian model were claimed in the literature. The loneliness of the planets of the sample speaks in favor of the high-eccentricity migration mechanism that probably brought them to their tight orbits observed nowadays. As a by-product of our study, the transit light curve parameters were redetermined with a substantial improvement of the precision for six systems. For KELT-24 b, a joint analysis allowed us to place a tighter constraint on its orbital eccentricity.

Słowa kluczowe

EN

stars: individual: KELT-18; stars: individual: KELT-23; stars: individual: KELT-24; stars: individual: Qatar-8; stars: individual: WASP-62; stars: individual: WASP-100; stars: individual: WASP-119; stars: individual: WASP-126; planets and satellites: individual: KELT-18 b; planets and satellites: individual: KELT-23 b; planets and satellites: individual: KELT-24 b; planets and satellites: individual: Qatar-8; planets and satellites: individual: WASP-62 b; planets and satellites: individual: WASP-100 b; planets and satellites: individual: WASP-119 b; planets and satellites: individual: WASP-126 b

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2020
• Tom: Vol. 70, No. 3
• Strony: 181--202
• Opis fizyczny: Bibliogr. 54 poz., rys., tab., wykr.

Twórcy

autor

Maciejewski G.

• Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland

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